Revolving door structure



Feb. 26, 1935. B. H. UHRICH 1,992,847

REVOLVING DOOR STRUCTURE Original Filed Oct. 6, 1931 2 Sheets-Sheet 1 jj'gi.

INVENTOR WITNESSES I11 Z7076 z ATTORNEY Feb. 26, 1935. B. H UHRICH REVOLVING DOOR STRUCTURE Original Filed Oct. 6, 1931 2 Sheets-Sheet 2 INVENTORV $.13. Z /2ru/z BY WITNESSES ATTORNEY Patented Feb. 26, 1935 REVOLVING DOOR STRUCTURE Burns H. Uhrich, Independence, Kans., assignor to The Atchison Revolving Door 00., Independence, Kans., a corporation of Delaware Application October 6,1931, Serial ascazts Renewed December 27, 1934 5 Claims. (01. 20-18) This invention relates to revolving doors, and has particular reference .to an'improved door of the three-leaf type which is particularly adapted to be employed in lieu of the usual four-leaf type revolving door, whereby to either conserve space or fit a restricted spacewhich' will not accommodate the usual four-leaf type revolving door.

The outstanding object of the present invention is to provide a three-leaf type revolving door and enclosure therefor which is so constructed as to maintain an air seal in the enclosure, while affording ample space to permit of simultaneous ingress and egress from between each adjacent pair of leaves.

The invention further aims to provide a threeleaf revolving door structure, in which two of the wings are foldably carried by the remaining wing to permit of the collapsing of the door and movement of the same when so collapsed, to one side of the enclosure.

More specifically, the invention resides in a revolving door structure having three equi-distant radial leaves concentrically mounted for rotation within a circular enclosure, in which diametrically opposite passages formed in said enclosure are of lesser width than the spacing of the free edges of adjacent leaves, together with wings extending circumferentially in one direction from the outer free edges of the leaves whereby the free edge of each wing is spaced from the free edge of an adjacent door leaf a distance approximately equal to the width of the enclosure passages, thereby permitting of the use of wider passages than would otherwise be practical.

Other objects of the invention reside in the comparative simplicity of the construction, the economy withwhich it may be produced and installed and the general efficiency derived therefrom.

With the above recited and other objects in view, reference is had to the following description and accompanying drawings, in which there is exhibited one example or embodiment of the invention, while the claims define the actual scope of the same.

In the drawings:

Figure 1 is a front view of the complete door structure and enclosure therefor.

Figure 2 is a sectional plan View showing the leaves in normal radial position.

Figure 3 is a similar view illustrating the leaves and wings in collapsed or folded condition and arranged at one side of the enclosure.

Referring to the drawings by characters of reference, A designates generally the usual circular enclosure whichis provided with diametrically opposite passages B and C, which in the present instance are of a width approximating of the circumference of the enclosure but slightly less, which is the common proportion of an en- 5 closure for doors of the four-leaf type.

The door in the present instance, howevenincludes three equi-distant radial leaves 5, 6 and 7, the door being mounted for rotation concentrically of the enclosure and supported in any suitable manner. The leaves are formed at their outer free edges with the usual sealing strips or fiexible wiper blades 8 which are common to revolving doors. It is apparent, however, that a proper airseal cannot be obtained by a three-leaf door in all positions of the door in the enclosure where the proportion of the passages is as illustrated and described, and, hence, the present invention comprehends the use of circumferentially extending wings 9, one being carried by the free outer edge of each door leaf and said wings being of a suflicient length to establish the necessary air seal through the passage in all positions of the door. The wings 9 all extend in the same direction, preferably in the direction of rotation of the door, and the width of the wings is such that the distance between the free edge of each wing 9 and the free outer edge of the adjacent door leaf approximates the width of the enclosure passages. The free edge of each wing is provided with a radial sealing strip or wiper blade 10 corresponding to the wiper blades or sealing strips 8 which are provided at the outer free edge of each door leaf.

The door leaf 5 in the present instance will be termed for the purpose of convenience, the main leaf, and said main leaf 5 carries the other two leaves 6 and '7 on opposite sides thereof adjacent the inner edge, the leaves 6 and 7 being connected thereto by hinges 11 and 12, which permits of the folding of the wings into substantially parallel relation to each other when it is desired to collapse the door. The hinged connection between the leaves is such that the inner edges 13 and 14 of the leaves 6 and '7 respectively abut against the opposite sides of the main leaf 5 when the leaves are in their normal radial position. Any suitable means, such as the retaining bars 15, may extend between adjacent leaves for holding the door in its opened active normal position. In order to permit of the complete folding of the door, the wings 9 are connected by hinges 16 to the leaves adjacent the outer free edge thereof to permit said wings to be folded into substantially parallel relation to the leaves. Any suitable means for retaining and bracing the wings in their opened active position may be employed, such as the rods 17. Obviously, within the scope of the invention, the door leaves and wings may be of arcuate formation as shown, or otherwise, and the manner of mounting the door for rotation and for moving the same to one side of the enclosure when folded may be of any type, such as that illustrated, or otherwise, as this forms no part of the present invention.

By constructing a three-leaf type door in the manner previously set forth and employing an enclosure having passages of the proportion indicated, it is obvious that revolving doors may be installed in a restricted space which will not accommodate the usual four-leaf type door, or doors of this nature may be employed in lieu oi four-leaf doors to conserve space.

While there has been illustrated and described a single and preferred embodiment of the invention, no limitation is necessarily intended to the precise structural details herein shown, as it is to be understood that variations and modifications which properly fall within the scope of the claims may be resorted to when desired.

What is claimed is:

1. In a revolving door structure, a door having three radial leaves, a circular enclosure within which the door is concentrically mounted for rotation, said enclosure having diametrically opposite passages of less width than the distance between the free edges of adjacent leaves and curved wings extending circumferentially from the free outer edges of the leaves with the free edges of said wings spaced from the free edges of adjacent leaves a distance approximately equal to the width of the enclosure passages.

2. In a revolving door structure, a door having radial leaves, a circular enclosure within which the door is concentrically mounted for rotation, said enclosure having diametrically opposite passages of less width than the distance between the free edges of adjacent leaves and curved wings extending circumferentially from the free outer edges of the leaves with the free edges of said wings spaced fromthe free edges of adjacent leaves a distance approximately equal to the width of the enclosure passages.

3. A revolving door including three leaves, two of which are hingedly connected at their inner edges directly to the inner edge of the remaining leaf to swingfrom an active radial relation to the axis of rotation of the door to a folded nested relation.

4. A revolving door including three leaves, two of which are hingedly connected directly to the remaining leaf to swing from an active radial relation to the axis of rotation of the door to a folded nested relation, the two first mentioned wings having the inner edges thereof abutting with the opposite sides of the remaining wing when the door is in its active position for rotation.

,5, A revolving door including three arcuate leaves pivotally connected, at their inner edges to swing from an active radial'position to afold ed nested position parallel to each other, and an arcuate wing pivotally connectedadjacent the outer edge of each leaf so as to swing from an extended position to a parallel nested position when the leaves are collapsed. 7

BURNS H. UHRICH. 

